The Nameless (Spanish: Los Sin Nombre; Catalan: Els sense nom) is a 1999 Spanish horror film directed by Jaume Balagueró in his directorial debut, and starring Emma Vilarasau, Karra Elejalde, and Tristán Ulloa. Based on the 1981 horror novel of the same name by English writer Ramsey Campbell, it follows a mother who receives a phone call from her believed-deceased daughter five years after her apparent occult-related ritualized murder, uncovering a nefarious cult preoccupied with the metaphysical aspects of corruption and evil.

The film premiered at the Sitges Film Festival in October 1999, and went on to receive the Méliès d'Or award at the Méliès International Festivals Federation. Filmax distributed the film theatrically in Spain, releasing it in November 1999. The Nameless proved to be a box-office success, and has been credited for spearheading a series of major studio horror films produced in Spain in the 2000s.

In the United States, the film was acquired by the Miramax subsidiary Dimension Films, who released it directly to video in 2005, after theatrically distributing Balagueró's second feature film, Darkness (2002).